Red Hat Product Errata RHSA-2026:58835 - Security Advisory Issued: 2026-08-24 Updated: 2026-08-24 RHSA-2026:58835 - Security Advisory Overview Updated Packages Synopsis Important: fence-agents security update Type/Severity Security Advisory: Important Red Hat Lightspeed patch analysis Identify and remediate systems affected by this advisory. View affected systems Topic An update for fence-agents is now available for Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. Description The fence-agents packages provide a collection of scripts for handling remote power management for cluster devices. They allow failed or unreachable nodes to be forcibly restarted and removed from the cluster. Security Fix(es): pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values (CVE-2026-59886) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.6 x86_64 Red Hat Enterprise Linux Server - AUS 8.6 x86_64 Red Hat Enterprise Linux High Availability for x86_64 - Extended Life Cycle Long Life 8.6 x86_64 Fixes BZ - 2500041 - CVE-2026-59886 pyasn1: pyasn1: Denial of Service via crafted ASN.1 REAL values CVEs CVE-2026-59886 References https://access.redhat.com/security/updates/classification/#important Note: More recent versions of these packages may be available. Click a package name for more details. Red Hat Enterprise Linux for x86_64 - Extended Life Cycle Long Life 8.6 SRPM fence-agents-4.2.1-89.el8_6.26.src.rpm SHA-256: b1d9634bf75d412b859b0c27721f17aaec13af92e9dd791e3473fafa50d99eaa x86_64 fence-agents-aliyun-debuginfo-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: ad96d5342973330b661a4e09d54bdb1fe6ce03b1c5aaf6cb3f3229e00eeebd1e fence-agents-all-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 373ba106e9d52d6a2025f5d60bf35e113b5bbdbcbf2f9f99c3bd31a051526863 fence-agents-amt-ws-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 479c62222224f0c38633f78e64aa845fbe7eec17c8b8a911b312ee169188ceff fence-agents-apc-4.2.1-89.el8_6.26.noarch.rpm SHA-256: b15552a0bc90cb1b79d15f1c8716a8b1294f0a110041b7299ab269064be8d1c9 fence-agents-apc-snmp-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 53d0799c5f1bd6b71974ca87bfcd8b691b8f27dd9117edcddcd8a21c1b3ad04a fence-agents-bladecenter-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 492f697d60cbb231fa70bb6e80eb52c409756285457cca382c4cce63721cd4d3 fence-agents-brocade-4.2.1-89.el8_6.26.noarch.rpm SHA-256: de8357318b5d4b55b6fffc6a9e69b901be07bfb1291462abcb48232c067be13d fence-agents-cisco-mds-4.2.1-89.el8_6.26.noarch.rpm SHA-256: f4ed7069b7b480e79bb870e6d000b8da279266e62262260016bf4b5806c76d3a fence-agents-cisco-ucs-4.2.1-89.el8_6.26.noarch.rpm SHA-256: cc7f7b0b7039c49c98e6f94bd1821cc9e8ca3902d9a0fdce5caa7f91fee2c070 fence-agents-common-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 756cc6442cebe71539bd0d4e766953769a1a1e5eeff2776785011b5a2e182d40 fence-agents-compute-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 8733178a6024f8736d070ec51640baf202b2af2c6ddce2fe203b53960f6844bf fence-agents-debuginfo-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: e3107db83f5a19dea733402b93522b084222b2a9bf402abc7b6fb7843662b1bd fence-agents-debugsource-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 0f19a0273a1fbedef40184f8fa55c61a1a42924822e285722062e3a11259af46 fence-agents-drac5-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 3975a74385ced89366265fe99df6db44a3fe5c6fcff98eec529af605d145d796 fence-agents-eaton-snmp-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 078e873463b5d37023c1e33ef0edce64f54bc2084dd3913519efed2bb96ed2fe fence-agents-emerson-4.2.1-89.el8_6.26.noarch.rpm SHA-256: bae4fca07d69b6f7f6b184afc8b751e8d4b7d62fb57dc770a1effb37fdcf35a9 fence-agents-eps-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 28406fa41fd4e2d132aeccbac431dfda97fb4108ee79907dd210d01ea176a7e5 fence-agents-heuristics-ping-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 0b40390f940ef4850c97edd0f9150887db7846058d22d2f948f66783dad01459 fence-agents-hpblade-4.2.1-89.el8_6.26.noarch.rpm SHA-256: fe96733a261742b5ed2dcff465061150677860e8f3c584209bd1b0585cbac309 fence-agents-ibm-powervs-4.2.1-89.el8_6.26.noarch.rpm SHA-256: d6beb4333c1ed4f67937d7b3f8a510a7587575583c6702a9db490490b6f6f230 fence-agents-ibm-vpc-4.2.1-89.el8_6.26.noarch.rpm SHA-256: d4fba7af43fef6e516adafa236f493b2cbbf9189f948a8fcb1b74c9a7cab737f fence-agents-ibmblade-4.2.1-89.el8_6.26.noarch.rpm SHA-256: a604a9a69f88bead1c4a6da9a119a007a3521d4d370ca139822227ee7c656dd1 fence-agents-ifmib-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 4ea5c0a7641fcce4ef7f88f6aa835951a36e5813d21f350d7ebe7ff4da8d49f7 fence-agents-ilo-moonshot-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 32e9cc2709d0086882b3d018ea2d3249700390239c75506b317d8a2eb4ecac1a fence-agents-ilo-mp-4.2.1-89.el8_6.26.noarch.rpm SHA-256: a3c29ada7362fddd7a09e9eef4512c321f1095677df9ab3c2ce0b50afebde0fe fence-agents-ilo-ssh-4.2.1-89.el8_6.26.noarch.rpm SHA-256: fef25a2e217996013b1a98f34d82308c44579b2f232eb7fc7680242f050f8de8 fence-agents-ilo2-4.2.1-89.el8_6.26.noarch.rpm SHA-256: dc671e47bd5c7976104367dd27e272244f7a0b32681831727ba650494244f182 fence-agents-intelmodular-4.2.1-89.el8_6.26.noarch.rpm SHA-256: cdceec6b69c7c0d6b3c7d3415cbc543a1b114bf011f27d4222ac5e40802aa5e0 fence-agents-ipdu-4.2.1-89.el8_6.26.noarch.rpm SHA-256: e3be4b7b873c52a247d836c5530a72ed5c07bf7aee63332c99fa80ac35491994 fence-agents-ipmilan-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 859078dc3539c0d5c33bedeca3cc3e5d99bec8cf5341805d8c71ce9e2c192770 fence-agents-kdump-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 50aafe7d6c8cc3f147f5ec29ad37199b44506a53deab4ea662380aa75a8fd37c fence-agents-kdump-debuginfo-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 79088205077bc3c588efa9696fb84006ce00fea734202b4e84394ee67c1bde05 fence-agents-kubevirt-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 10d33d940ca9400256077bac71cd123cc182c63139a770ebb8ecffada5d25744 fence-agents-kubevirt-debuginfo-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 657794889652f71fd17afd467fd516cecc470c0ae0e729ee1e75681b9217f077 fence-agents-lpar-4.2.1-89.el8_6.26.noarch.rpm SHA-256: ae6f4e6c12261df9fdb7aa16f6357b40e9de54df7426d787b2b147ba096dfd8e fence-agents-mpath-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 7cb5d2e8784e72ee7bbdf747ea7a3f34773f3c976b2aeca5898fc8e0727fb8d7 fence-agents-nutanix-ahv-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 28a8540373e4529d96a544b949093aceeb2caafbfe1ff0721e200541b7381bf5 fence-agents-redfish-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: c686f59bf815fe95e9112c156fcccd63d09fc9f5cb6dd35f3a3ab3599e1107e2 fence-agents-rhevm-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 2ced87ba7049a11650e7e407402e1ed20b51307a3aa8d1b8a034eb730181fee4 fence-agents-rsa-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 3ca3bea994521fa28dba2029b5af3294b513f071de8c95fec176c85664d6513c fence-agents-rsb-4.2.1-89.el8_6.26.noarch.rpm SHA-256: a1397f3c85f2fe7bb1df87e3f155ed29a4138059ffd5cfc06f46b08dd4476ec5 fence-agents-sbd-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 40a60403bbb80970901a95c32e9e65f871a316eacea349e6762d53f4c87d2c31 fence-agents-scsi-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 6f655d53ccde15f162cd3fa56384fb285e2199162065b4ae13aefe27e3cba291 fence-agents-virsh-4.2.1-89.el8_6.26.noarch.rpm SHA-256: ac501894b0b650ab8acaea1de97189884e778ef2d8ce2e92786c56a5bf819b03 fence-agents-vmware-rest-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 7b6c1f4f6cf1e782ac5f28f7c3bad6045649a1cfbc9f7b62ea1add479410a453 fence-agents-vmware-soap-4.2.1-89.el8_6.26.noarch.rpm SHA-256: c4a022bdbd61f6f5f70005c4bd30c25d44e23b69671f2dbe9f5b98556cb6b6ac fence-agents-wti-4.2.1-89.el8_6.26.noarch.rpm SHA-256: a8fcb03fe652abfeb92c8e525e63f5646e4f5137d2cc069f984f68ea8db0a7ed Red Hat Enterprise Linux Server - AUS 8.6 SRPM fence-agents-4.2.1-89.el8_6.26.src.rpm SHA-256: b1d9634bf75d412b859b0c27721f17aaec13af92e9dd791e3473fafa50d99eaa x86_64 fence-agents-aliyun-debuginfo-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: ad96d5342973330b661a4e09d54bdb1fe6ce03b1c5aaf6cb3f3229e00eeebd1e fence-agents-all-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 373ba106e9d52d6a2025f5d60bf35e113b5bbdbcbf2f9f99c3bd31a051526863 fence-agents-amt-ws-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 479c62222224f0c38633f78e64aa845fbe7eec17c8b8a911b312ee169188ceff fence-agents-apc-4.2.1-89.el8_6.26.noarch.rpm SHA-256: b15552a0bc90cb1b79d15f1c8716a8b1294f0a110041b7299ab269064be8d1c9 fence-agents-apc-snmp-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 53d0799c5f1bd6b71974ca87bfcd8b691b8f27dd9117edcddcd8a21c1b3ad04a fence-agents-bladecenter-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 492f697d60cbb231fa70bb6e80eb52c409756285457cca382c4cce63721cd4d3 fence-agents-brocade-4.2.1-89.el8_6.26.noarch.rpm SHA-256: de8357318b5d4b55b6fffc6a9e69b901be07bfb1291462abcb48232c067be13d fence-agents-cisco-mds-4.2.1-89.el8_6.26.noarch.rpm SHA-256: f4ed7069b7b480e79bb870e6d000b8da279266e62262260016bf4b5806c76d3a fence-agents-cisco-ucs-4.2.1-89.el8_6.26.noarch.rpm SHA-256: cc7f7b0b7039c49c98e6f94bd1821cc9e8ca3902d9a0fdce5caa7f91fee2c070 fence-agents-common-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 756cc6442cebe71539bd0d4e766953769a1a1e5eeff2776785011b5a2e182d40 fence-agents-compute-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 8733178a6024f8736d070ec51640baf202b2af2c6ddce2fe203b53960f6844bf fence-agents-debuginfo-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: e3107db83f5a19dea733402b93522b084222b2a9bf402abc7b6fb7843662b1bd fence-agents-debugsource-4.2.1-89.el8_6.26.x86_64.rpm SHA-256: 0f19a0273a1fbedef40184f8fa55c61a1a42924822e285722062e3a11259af46 fence-agents-drac5-4.2.1-89.el8_6.26.noarch.rpm SHA-256: 3975a74385ced89366265fe99df6db44a3fe5c6fcff98eec529a